參數(shù)資料
型號: SAF-XC2786X-96F66L66
廠商: INFINEON TECHNOLOGIES AG
元件分類: 微控制器/微處理器
英文描述: 32-BIT, FLASH, MICROCONTROLLER, PQFP144
封裝: 0.50 MM PITCH, GREEN, PLASTIC, LQFP-144
文件頁數(shù): 118/119頁
文件大?。?/td> 1432K
代理商: SAF-XC2786X-96F66L66
XC2786X
XC2000 Family Derivatives
Electrical Parameters
Preliminary
Data Sheet
96
V2.0, 2008-03
Wakeup Clock
When wakeup operation is selected (SYSCON0.CLKSEL = 00B), the system clock is
derived from the low-frequency wakeup clock source:
f
SYS = fWU.
In this mode, a basic functionality can be maintained without requiring an external clock
source and while minimizing the power consumption.
Selecting and Changing the Operating Frequency
When selecting a clock source and the clock generation method, the required
parameters must be carefully written to the respective bitfields, to avoid unintended
intermediate states.
Many applications change the frequency of the system clock (
f
SYS) during operation in
order to optimize system performance and power consumption. Changing the operating
frequency also changes the switching currents, which influences the power supply.
While the core voltage is generated by the on-chip EVRs, the operating frequency can
only be changed by maximum factors of 5 or in maximum steps of 20 MHz, whichever
condition is tighter.
To avoid the indicated problems, recommended sequences are provided which ensure
the intended operation of the clock system interacting with the power system.
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